From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
"Andrii Nakryiko" <andriin@fb.com>, "Yonghong Song" <yhs@fb.com>,
"Song Liu" <songliubraving@fb.com>,
"Martin KaFai Lau" <kafai@fb.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"David Miller" <davem@redhat.com>,
"Björn Töpel" <bjorn.topel@intel.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"Jesper Dangaard Brouer" <hawk@kernel.org>,
"Arnaldo Carvalho de Melo" <acme@redhat.com>,
"Song Liu" <song@kernel.org>
Subject: [PATCH 11/15] bpf: Add dispatchers to kallsyms
Date: Thu, 12 Mar 2020 20:56:06 +0100 [thread overview]
Message-ID: <20200312195610.346362-12-jolsa@kernel.org> (raw)
In-Reply-To: <20200312195610.346362-1-jolsa@kernel.org>
Adding dispatchers to kallsyms. It's displayed as
bpf_dispatcher_<NAME>
where NAME is the name of dispatcher.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
include/linux/bpf.h | 19 ++++++++++++-------
kernel/bpf/dispatcher.c | 1 +
2 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 7edbf30cf2b2..95e13efe658a 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -531,6 +531,7 @@ struct bpf_dispatcher {
int num_progs;
void *image;
u32 image_off;
+ struct bpf_ksym ksym;
};
static __always_inline unsigned int bpf_dispatcher_nop_func(
@@ -546,13 +547,17 @@ struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
int bpf_trampoline_link_prog(struct bpf_prog *prog);
int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
void bpf_trampoline_put(struct bpf_trampoline *tr);
-#define BPF_DISPATCHER_INIT(name) { \
- .mutex = __MUTEX_INITIALIZER(name.mutex), \
- .func = &name##_func, \
- .progs = {}, \
- .num_progs = 0, \
- .image = NULL, \
- .image_off = 0 \
+#define BPF_DISPATCHER_INIT(_name) { \
+ .mutex = __MUTEX_INITIALIZER(_name.mutex), \
+ .func = &_name##_func, \
+ .progs = {}, \
+ .num_progs = 0, \
+ .image = NULL, \
+ .image_off = 0, \
+ .ksym = { \
+ .name = #_name, \
+ .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
+ }, \
}
#define DEFINE_BPF_DISPATCHER(name) \
diff --git a/kernel/bpf/dispatcher.c b/kernel/bpf/dispatcher.c
index b3e5b214fed8..a2679bae9e73 100644
--- a/kernel/bpf/dispatcher.c
+++ b/kernel/bpf/dispatcher.c
@@ -143,6 +143,7 @@ void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
d->image = bpf_image_alloc();
if (!d->image)
goto out;
+ bpf_image_ksym_add(d->image, &d->ksym);
}
prev_num_progs = d->num_progs;
--
2.24.1
next prev parent reply other threads:[~2020-03-12 19:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-12 19:55 [PATCHv5 00/15] bpf: Add trampoline and dispatcher to /proc/kallsyms Jiri Olsa
2020-03-12 19:55 ` [PATCH 01/15] x86/mm: Rename is_kernel_text to __is_kernel_text Jiri Olsa
2020-03-12 19:55 ` [PATCH 02/15] bpf: Add bpf_trampoline_ name prefix for DECLARE_BPF_DISPATCHER Jiri Olsa
2020-03-12 19:55 ` [PATCH 03/15] bpf: Add struct bpf_ksym Jiri Olsa
2020-03-12 19:55 ` [PATCH 04/15] bpf: Add name to " Jiri Olsa
2020-03-12 19:56 ` [PATCH 05/15] bpf: Move lnode list node " Jiri Olsa
2020-03-12 19:56 ` [PATCH 06/15] bpf: Move ksym_tnode to bpf_ksym Jiri Olsa
2020-03-12 19:56 ` [PATCH 07/15] bpf: Add bpf_ksym_find function Jiri Olsa
2020-03-12 19:56 ` [PATCH 08/15] bpf: Add prog flag to struct bpf_ksym object Jiri Olsa
2020-03-12 19:56 ` [PATCH 09/15] bpf: Add bpf_ksym_add/del functions Jiri Olsa
2020-03-12 19:56 ` [PATCH 10/15] bpf: Add trampolines to kallsyms Jiri Olsa
2020-03-12 19:56 ` Jiri Olsa [this message]
2020-03-12 19:56 ` [PATCH 12/15] bpf: Remove bpf_image tree Jiri Olsa
2020-03-12 19:56 ` [PATCH 13/15] perf tools: Synthesize bpf_trampoline/dispatcher ksymbol event Jiri Olsa
2020-04-06 12:54 ` Arnaldo Carvalho de Melo
2020-04-06 13:00 ` Jiri Olsa
2020-03-12 19:56 ` [PATCH 14/15] perf tools: Set ksymbol dso as loaded on arrival Jiri Olsa
2020-03-12 19:56 ` [PATCH 15/15] perf annotate: Add base support for bpf_image Jiri Olsa
2020-03-13 2:39 ` [PATCHv5 00/15] bpf: Add trampoline and dispatcher to /proc/kallsyms Alexei Starovoitov
2020-03-13 8:31 ` Jiri Olsa
2020-04-03 15:32 ` Arnaldo Carvalho de Melo
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